Nakanishi, Shigetada, et al. “Molecular Diversity of Glutamate Receptors and Their Physiological Functions.”10.1007/978-3-0348-7330-7_8__Experientia Supplementum, vol. 71, Birkhäuser, 1994, pp. 71–80, doi:10.1007/978-3-0348-7330-7_8.